Auto-toggle TouchControls in-game when receiving touch/mouse input

irr/include/IEventReceiver.h

@@ -347,6 +347,9 @@ struct SEvent
 
 		//! Type of mouse event
 		EMOUSE_INPUT_EVENT Event;
+
+		//! Is this a simulated mouse event generated by Minetest itself?
+		bool Simulated;
 	};
 
 	//! Any kind of keyboard event.
@@ -538,6 +541,11 @@ struct SEvent
 		struct SUserEvent UserEvent;
 		struct SApplicationEvent ApplicationEvent;
 	};
+
+	SEvent() {
+		// would be left uninitialized in many places otherwise
+		MouseInput.Simulated = false;
+	}
 };
 
 //! Interface of an object which can receive events.